US2518051A - Garden cultivator - Google Patents

Description

Aug. 8, 1950 c. R. NELSON GARDEN CULTIVATOR 2 Sheets-Sheet 1 Filed Oct. 7, 1947 INVENTOR. 52w 12. MV/QOf? m N, w T A Aug. 8, 1950 c. R. NELSON GARDEN CULTIVATOR 2 Sheets-Sheet 2 Filed Oct. 7, 1947 N WQ Patented Aug. 8, 1950 UNITED STATES PATENT OFFICE GARDEN 'CULTIVATOR Carl R. Nelson, Kansas City, Mo. Application October 7, 1947, Serial No. 778,489

1 'Claim. 1

This invention relates to improvements in tractor and cultivator assemblies, and more particularly to an assembly including a garden or walking tractor, a set of cultivating implements attached to the tractor, and a flexible hitch between the tractor and the set of implements.

A large number of small tractors are now in use for gardening, lawn cultivation and similar purposes. The majority of these are two-wheeled devices powered by small gasoline engines of from one to five horse-power and provided with a pair of plow handles by means of which the tractor is guided and controlled by an attendant walking behind the tractor. conventionally the cultivating implements are secured to such a walking tractor by a rearwardly extending tongue or bar rigidly attached to the tractor frame. With such an arrangement, if the tractor comes too close to a row being cultivated the handles must be moved toward the row in order to head the tractor away from the row, and the rigidly attached implement is then also moved toward or into the row, destroying a numbe of plants before the position-of the tractor and implement relative to the row can be fully corrected. Conventional cultivating implements are provided as entirely independent, unitary devices so that it is necessary to detach one from the tractor and attach another in order to change the cultivating operation. Such implement replacement causes an important loss of time and a large amount of heavy manual labor as the implements usually have to be lifted into position and the implement and tractor moved relative to each other to uncouple one implement and couple another to the tractor.

It is among the objects of the present invention to provide an improved tractor and implement assembly wherein the implement is coupled to the tractor by a flexible or pivoted hitch which maintains the implement in operative position behind the tractor and provides for lifting of the implement by the tractor handles, and, at the same time, provides a sufficient freedom of lateral movement of the implement relative to the tractor so that the tractor may be turned away from a row of plants without moving the implement into the row or may be turned toward the row without moving the implement further away from the row, and maybe conditioned, when desired, to provide a substantially rigid connection between the tractor and the implement, which assembly also provides several difierent implements permanently secured to a common mounting and connected to the tractor in a manner such that any one of the implements can be brought into operative position without uncoupling or coupling the tractor and such that the.

tractor and implement assembly is simple, durable and economical in construction, is light in weight was not to impose unnecessarily heavy loads on the tractor operator, is simple and easy to assemble and adjust, and may be used for long intervals without servicing or repair.

. Other objects and advantages will become ap parent from a consideration of the following description in conjunction with the accompanying drawing, wherein: Figure l is a side elevation of a tractor andimplement assembly illustrative of the invention.

Figure 2 is a top plan view of the assembly illustrated in Figure 1.

; Figure 3 is a transverse cross-section showing, on an enlarged scale, an implement support operatively connected to the tractor, the plane of the cross-section being substantially on the line 3 of Figure 1.

Figure 4 Ba perspective view of a hinge plate a pair of which are respectively connected to the opposite ends of the support illustrated in Figure 3.

Figure 5 is a vertical elevation of a modified form of implement-support showing cultivating implements attached to the lowe ends thereof. Figure 6 is a side elevation of a modified form of implement support illustrated in Figure 5.

Figure 7 is a transverse cross-section taken substantially on the line l of Figure 5.

-With continued reference to the drawings, the tractor comprises a substantially rectangular frame, generally indicated at Ill, mounted intermediate its length on an axle I2 having a pair of wheels 22 secured one to each end thereof. The frame is journaled on the axle by suitable bearing blocks H and the wheels 22 are rigidly secured tothe axle end portions to rotate with the axle. A power plant l4, illustrated as a small gasoline engine of conventional construction, is mounted upon the front end of the frame and provided with a drive sprocket l8 drivingly connectedby a chain l6 with a sprocket 20 mounted. on the axle I2. A suitable clutch is preferably interposed between the sprocket 2D and the axle and a clutch control is extended rearwardly from the entirely conventional, illustration thereof has been omitted in order to simplify the drawings.

The frame has a front cross-member 24 upon which the engine M is supported and a rear cross-member 26 connecting together the rear ends of the frame side members 25. A pair of plow-type handles 28 and 30 are connected at their front ends to the rear end of frame Ill, one at each side thereof, and extend rearwardly of the frame. so.- that a person, walking. behind the tractor, by grasping the rearward ends of the handles may control the direction of the tractor-.

Adjacent their rearward ends the handles are connected by a conventional rung 38 upon which the clutch control and the throttle or governor a control of the engine may be conveniently mounted.

A pair of lugs 21 are attached respectively to the opposite side members 25 of the frame and project downwardly from the frame immediately ahead of the axle t2. These; lugs are-provided in. their lower endswith apertures which receivethe shanks of respective eye bolts. 29 which extendoutwardly of the frame one at each side thereof; A of spaced apart, parallel links 42 are respectively connected at: their front or forward; ends to the eye' bolts 28' and extend rearwardly between the corresponding sides of the tractor frame and the adiacentwheels 22. These links are bowed outwardly intermediate their ends, to bring them into substantially vertical alignment with the forward end portions of the respective handles 28 and 30 and are respectivelyconnected to the adjacent handles by suitable struts 55. Each strutpreferably has its upper end apertured and pivotally connected to an eye bolt 3| secured, to the adjacent handle and, its lower end aperturedj and connected to an eye bolt 33 secured tothe corresponding link 42- intermediate the length thereof. Each strut may be formed in. two separate pieces adjustably' secured together so that the length ofthe struts 50 ca-nbe adjusted as desired; Respective hinge; plates 64 are pivotally connected to the rear ends of the links 42 by suitable hinge connections each of which may com prise a pair of spaced apart loops 62- formed on the forward edge of the corresponding hinge plate, a loop 58- formed' on the rearward end or each link 42 and a hinge pin 60 extended through the aligned loops. Each hinge plate 64 may conveniently have a substantially rectangular shape andis provided witha substantially central aperture T9, and along the edge opposite the loops 62 with an outwardly extending flange 89 the center portion of which is cut away t provide a notch 81 fora purpose which will presently appear; Each hinge plate is provided between the loops 62 on the forward edge thereof with a forwardly extending tongue 66' which overlies the; rear endportion of the corresponding link 42- and a pair of set screws Bfljthreaded respectively through apertures in the-rear end portions of the links 42", are engageablewith the opposed faces of the tongue 66 when it is, desired to lock the tractor hitch including the links 42 and hinge plates 64 against lateral. swinging movements relative to the tractor frame.

In the arrangement shown in Figures 1 and 2, a, tubular, cylindrical tool; support 14 is disposed between the opposite hinge plates 64' and provi'ded' with substantially circular end plates, 16 each of which has. a plurality of angularly spaced radial extensions [8. engageable in. the, notches 81 of the respective hinge plates 64' to secure the tool support in a selected rotational position to the hinge plates and against rotation relative to the hinge plates except during selection of a desired rotational position of the support. A plurality of tools 82, 84 and 88 are secured to the support M and extend radially thereof at angularly spaced intervals therearound. As illustrated, the tools are connected to the support by suitable respective standards d6. secured at their innerends to theimid-len'gth portion of the tubular implement support.

In the illustrated arrangement the tool 82 is represented as a turning plow, the tool 84 as a toothed cultivator or weeder and the tool 88 as a shovelpl w.

" The tubular support 14 is secured to the hinge plates'M by meansof a bolt or rod 12 which extends .through the support and through the apertures 10 of the hinge plates and is externally screw-threaded at its ends to receive nuts 83 which clampthe hinge plates 64 to the endsof the support.

With this arrangement, and with the set screws 68 th-readeel'rm-twa'rdly away from the tongue 6 and with oneoi the tools 82, 84 or83' in operative position, the links 5'2- and hinge plates 64 provide a'fiexible hitch between the tractor and the tool support T4 so that when the rear ends of the handles are moved-toward a rowto head the tract'or away from the row, the implement support and. operative implement carried thereby will not be moved toward 'or intothe row as is the case with conventional" tractor hitches, but instead; the tool will be tu-rned'outwardly away from the row by the change-in the angular position of thetractor axlerelativeto the row. The position of the tractor and implement relative to the row: thus be quickly and" effectively adjusted without endangering any" of the" plants in "the' row being cultivated-L I I T Figures 5, 6, and 7 illustrate a different form of tool support which may be attached to the hinge plates Mwhen the tool support 14 is removed therefrom; This supportcomprises an inverted; U-sh-aped yoke 92 having apertures 53 one in; each leg thereof, which receive respective bolts [02; by means of which the legs of the yoke are secured to the corresponding'hinge plate 64. The. rearward edges of the legs of, the yoke rest against the flanges B6 of the corresponding hinge plates. to hold, the yoke against rotation relative to the hingev plates about the connecting bolts I02. In use, the yoke 92 may be positioned. to straddle a, row being cultivated and carry a row cultivator 96 at the lower end of. eachleg thereof.

In the arrangement illustrated, the implements, are, Vfl-shaped weeders having upper, frames 9'! and depending teeth 98. Each implement is se ouredto thelcwer end of'the corresponding yoke leg by a suitable boltv 99 passing through suitable. apertured lugs secured to. the, frame 91' near the point. thereof and through one of a series of apertures Hi: provided in thelower ends; of the legs." Preferably, a pair of vanes or discs 94 are secured one to. the lower end of each yoke leg in position to engage the ground slightly in advanceofi the implement 9.6 to hold these; implements .against sudden lateral movements which might endanger the plants inthe, row being cultivated. The discs are provided mainly' as g uides, but,. if desired, may be adjusted to perform a cultivating function such as that of ridging the earth up along each. side of the row. I

With the modified tool supports! attached to the hinge plates- 64 the links 4'2 provide a flexible hitch for the tool support which operates in the same manner as described above in connection with the tool support 14. As explained above, however, the hitch can be rendered rigid by threading the set screws 68 inwardly against the tongues 66 of the hinge plates. Also, the hitch can be held against movement in one direction by threading one of the set screws in to the proper extent and locking the set screw in adjusted position by the lock nut I 03.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claim rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claim are, therefore, intended to be embraced therein.

What is claimed is:

In a tractor and implement assembly, a walking tractor having a frame and a pair of handles extending rearwardly from said frame, an implement support disposed to the rear of said frame, 2

and a flexible hitch between said frame and said support comprising a pair of substantially parallel, spaced apart links each pivotally secured at its forward end to a respective side of said frame, means pivotally connecting each link to the adjacent handle, apertured hinge plates pivotally secured one to the rear end of each link, means detachably connecting said hinge plates to said implement support, and means on said hinge plates restraining said support against turning about said connecting means, said implement support comprising an inverted U-snaped yoke having apertures in the sides and implement attaching apertures in the end portions thereof, said connecting means comprising respective bolts extending through said hinge plates and the corresponding sides of said yoke, and said restraining means comprising a flange on the rearward edge of each hinge plate engaging the rearward edges of the sides of said yoke.

CARL R. NELSON,

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,553,919 Smith Sept, 15, 1925 2,151,117 Kepler Mar. 21, 1939 2,330,283 Hipple Sept. 28, 1943

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